<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>css3基础</title> 
<style> 
div
{
	width:300px;
	height:100px;
	background-color:yellow;
	box-shadow: 10px 10px 5px #888888;
}
</style>
</head>
<body>

<div>box-shadow显示阴影</div>

</body>
</html>